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Die Casting

Altair® VAR

VARed (ESR in vacuum) modified hot work tool steel with excellent toughness.

Chemical Composition

NO ~W. No C Si Cr Mo V
Altair VAR 2340 Mod VAR / 2343 Mod VAR 0,36 0,2 5,0 1,40 0,50

Material Properties

  • Excellent toughness and ductility,
  • Very good thermal checking resistance
  • High hot strength and tempering back resistance.
  • Very good thermal shock resistance.
  • Excellent cleanliness
  • Good weldability.
  • Good machinability.
  • Up to 54 HRc after heat treatment.
  • Recommended working hardness 44-52 HRc
  • Good nitriding and coating ability.

Certificate

Highly certified grade, and many properties’ quality is guaranteed by the certifying supplier company such as toughness, microstructure cleanness and many more.

Applications

  • Preferred for all dies and tools requiring high toughness and ductility
  • Cores and cavities for long run die casting dies.
  • Die casting dies:
    • Complex geometries.
    • Sections subjected to breaking risks.
    • Against to thermal fatigue cracks.
  • Dies and Cores in press forging dies,
  • Warm forging dies.
  • Precision Plastic injections molds,
  • High gloss plastic injection moulds,
  • Molds for piano black surfaces such as headlights lens molds.
  • Molds for abrasive polymers and reinforced resins.
  • Cutting and shearing blades thicker than 10 mm.
  • Cold forging and cold extrusion dies.

Heat Treatment

HEAT TREATMENT TEMPERATURE
Soft Annealing 740-780°C
Stress Relieving 600-650°C
Hardening 1000-1030°C
Tempering 550-650°C

Physical Properties

20°C 400°C 600°C
Elastic Modulus [kN/mm²] 205.000 175.000 145.000
Thermal Expansion Coefficient [10ˉ6/K] 11,8 12,7 12,9
Thermal Conductivity [W/mK] 29 30 33

Mechanical Properties

44 Hrc 48 Hrc 50 Hrc
Yield Strength Rp02 [N/mm²] 1200 1400 1500
Tensile Strength, Rm 1500 1680 1800

Properties

Toughness values

Impact resistance values obtained from samples oil hardened to 44-46 HRc and twice tempered:

Test Bölge Isı Ortalama
KV External zone 20°C 28 (Joule)
KV Core zone 20°C 28 (Joule)
KVW External zone 20°C 380 (Joule)
KVW Core zone 20°C 365 (Joule)

Delivery Condition

Max. 220 HB, Soft Annealed.

Tempering Graph